Function

Summary

Returns type information for a table's attributes.

Package

sql

Signature

list-attribute-types table &key database owner => result

Arguments

table

A table.

database

A database.

owner

nil, :all or a string.

Values

result

A list.

Description

The function list-attribute-types returns type information for the attributes in the table given by table.

database has a default value of *default-database*.

If owner is nil, only user-owned attributes are considered. This is the default.

If owner is :all, all attributes are considered.

If owner is a string, this denotes a username and only attributes owned by owner are considered.

result is a list in which each element is a list (attribute datatype precision scale nullable). attribute is a string denoting the attribute name. datatype is the vendor-specific type as described in attribute-type. nullable is 1 if the attribute accepts the value NULL, and 0 otherwise.

Notes

When using ODBC to connect to Access database, the nullable value is not reliable, at least on version 7.1. There seems to be a bug in the driver. Using ODBC with other DBMS works as documented.

Example

To print the type of every attribute in the database, do

(loop for tab in 

      (sql:list-tables)

      do 

      (loop for type-info in 

            (sql:list-attribute-types tab)

            do

            (format t "~&Table ~S Attribute ~S Type ~S" 

                    tab

                    (first type-info)

                    (second type-info))))

See also

attribute-type
list-attributes